1275701328 has 120 divisors (see below), whose sum is σ = 3905437536. Its totient is φ = 385516800.

The previous prime is 1275701327. The next prime is 1275701359. The reversal of 1275701328 is 8231075721.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1275701292 and 1275701301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1275701321) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 729351 + ... + 731097.

Almost surely, 2^1275701328 is an apocalyptic number.

1275701328 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1275701328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1952718768).

1275701328 is an abundant number, since it is smaller than the sum of its proper divisors (2629736208).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1275701328 is a wasteful number, since it uses less digits than its factorization.

1275701328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2233 (or 2224 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 1275701328 is about 35716.9613489166. The cubic root of 1275701328 is about 1084.5502260586.

The spelling of 1275701328 in words is "one billion, two hundred seventy-five million, seven hundred one thousand, three hundred twenty-eight".